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Abstract <p>Heat transfer in double-pipe heat exchangers with diffuser channels with small opening angles with gas and liquid coolants is numerically simulated. In the calculations, a three-parameter differential RANS turbulence model supplemented with a transfer equation for a turbulent heat flow is used. It is shown that due to the intensification of heat transfer in heat exchangers with diffuser channels, the amount of heat transferred from the hot coolant to the cold one increases compared to heat exchangers with channels with a constant cross section.</p>

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Double-Pipe Heat Exchanger with Diffuser Channels with Gas and Liquid Coolants

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • V. G. Lushchik,
  • A. I. Reshmin,
  • K. S. Egorov

摘要

Abstract

Heat transfer in double-pipe heat exchangers with diffuser channels with small opening angles with gas and liquid coolants is numerically simulated. In the calculations, a three-parameter differential RANS turbulence model supplemented with a transfer equation for a turbulent heat flow is used. It is shown that due to the intensification of heat transfer in heat exchangers with diffuser channels, the amount of heat transferred from the hot coolant to the cold one increases compared to heat exchangers with channels with a constant cross section.